Percentage Calculations and Applications

This video tutorial covers Math 7 Unit 4 Lesson 9, focusing on percentages less than 1%. It includes mental math techniques for calculating percentages, an activity on calculating the percentage of dishes served, and using tables for data analysis. The lesson also explores fractions of a percent and applies percentage calculations to real-world scenarios like population growth. Homework problems are provided for practice.

If 10 is what percentage of 50, what is the result?

• 10%

• 20%

• 25%

• 50%

In the waiter's example, what percentage of the total dishes were desserts?

• 10%

• 20%

• 30%

• 25%

What is the percentage of appetizers delivered by the waiter if there were 13 appetizers out of 40 dishes?

• 40%

• 32.5%

• 35%

• 25%

How can you calculate the percentage of a number using a constant proportionality?

• By dividing the number by 100

• By subtracting the constant proportionality from the number

• By multiplying the number by the constant proportionality

• By adding the constant proportionality to the number

What is the new population of a city if it increases by 8% from an original population of 243,000?

• 250,000

• 280,000

• 262,440

• 270,000

If a bakery used 30% more sugar this month than last month, and last month they used 560 kg, how much did they use this month?

• 750 kg

• 700 kg

• 800 kg

• 728 kg

What percentage of snacks sold were fruit cups if 8 out of 32 items were fruit cups?

• 20%

• 35%

• 25%

• 30%

Which of the following is equivalent to 3.5% of 20?

• 10% of 20

• 5% of 20

• 3.5% of 10

• 7% of 10

If a car can hold 4 passengers, how many passengers can 78 cars hold?

• 300

• 320

• 312

• 350

How many cars are needed to transport 78 passengers if each car holds 4 passengers?

• 21

• 18

• 19

• 20